Jet cleaning device



May 17, 1938. F. BOEHM JET CLEANING DEVICE Filed Aug. 10, 1935 m 0 & I a2 5 W/f/VESS.

QM (3.456% b Patented May 17, 1938 UNITED STATES PATENT OFFIE JETCLEANING DEVICE Application August 10, 1935, Serial No. 35,684

2 Claims.

A principal object of the present invention is to provide simple,reliable and efficient means for cleaning the nozzle orifices of jetdevices such as are provided in steam jet air pumps and in otherapparatus of the same general class or type.

Another object of the invention is to provide a cleaning device arrangedfor both rotary and endwise movement in respect to the nozzle orificeand so constructed that it operates to push objects, that obstruct theorifice, out and clear of the same.

Other objects of the invention will appear from the followingdescription at the end of which the invention will be claimed.

Generally stated the invention comprises the improvements to bepresently described and finally claimed.

In the following description reference will be made to the accompanyingdrawing in which the single figures is a longitudinal central sectionalview illustrating features of the invention.

Referring to the drawing, I is a body or steam chest and it is providedwith a curved fluid way 2 provided with a nozzle orifice 3. These partsare present in one form or another in many well known types ofapparatus, such as steam jet air pumps, but the invention is notconfined to such apparatus and it is applicable to nozzles through whichair or other fluid passes. 4 is a spindle ar ranged for rotation and forendwise reciprocation through the wall of the curved fluid way. The endof the spindle 5 is shown as concave. It is not necessarily of that formbut when it is concave and enters the orifice it operates to push anymaterial that clogs the orifice out of and clear of the same. Theconcavity shown in the end of the spindle provides a sharp annularcutting edge as is indicated in the drawing. 6 is a stop collar arrangedon the spindle and it cooperates with the inner face of the curved wallas a packing when the spindle is in its normal retracted position. Thespindle is urged out of the position shown in the drawing toward thatretracted position by the pressure of the steam or other fluidintroduced through the body or chest I. 8 is a spring interposed betweenthe stufiing box 9 and the hand wheel I and. its principal function isto prevent the spindle from sticking, or, in other Words, to overcomefriction of the spindle. I0 is a spindle guide and it is in the form ofa spider.

Normally the spindle is held in retracted position and the pressure ofsteam on the stop collar 5 B and the stress of spring 8 holds it in thatposition and effects a packing result. The pressure in the chest or bodyI holds the spindle in that position. To clean the orifice 3 the spindleis pushed inward to the position shown and given a 10 few turns by meansof the hand wheel I. In this way the orifice is cleaned and when thespindle is released it returns to its retracted position.

I claim:

1. A jet-cleaning device comprising, in combi- 15 nation, a body portionhaving an arcuate fluidway for facilitating the flow of fluidtherethrough and for providing space for a stop collar, said body havingan inner end provided with an inlet to the fluid way and an outerportion provided with a member extending into said outer portion andhaving an orifice communicating with said fluidway, a normally retractedspindle arranged for rotation and axial reciprocation through the wallof the arcuate fluidway and having a concaved end providing an annularcutting edge adapted to enter the orifice, a stop collar provided on thespindle and positioned in the fiuidway and freely exposed to thepressure therein and freely spaced from the wall of the fluidway, saidcollar adapted to operate fiatwise in co-operation with the inner faceof the wall of the fluidway as a packing, a stufiing-box packing saidspindle, a handle on the spindle, an anti-torsion spring between thehandle and the body, and a guide spider.

2. A jet-cleaning device comprising, in combination, a body providedwith a curved fluid way for conducting fluid therethrough, a nozzleorifice forming a part of said fluid way, and a spindle arranged forrotation and for endwise reciprocation through the wall of said curvedfluid way, one end of said spindle being concaved providing an annularcutting edge adapted to enter the orifice and operating to push anymaterial that clogs the orifice out of and clear of the same.

FREDERICK BOEHM.

